Remove empty folders after importing new downloads.

Fixed American Dad test (new season added to TheTvDb).
Removed unneeded .ToList()

NzbDrone.Core.Test/TvDbProviderTest.cs

@@ -85,7 +85,7 @@ namespace NzbDrone.Core.Test
             }
 
             //assert
-            seasonsNumbers.Should().HaveCount(7);
+            seasonsNumbers.Should().HaveCount(8);
             seasons[1].Should().HaveCount(23);
             seasons[2].Should().HaveCount(19);
             seasons[3].Should().HaveCount(16);

NzbDrone.Core/Providers/Jobs/PostDownloadScanJob.cs

@@ -84,6 +84,10 @@ namespace NzbDrone.Core.Providers.Jobs
 
                 var importedFiles = _diskScanProvider.Scan(series, subfolder);
                 importedFiles.ForEach(file => _diskScanProvider.MoveEpisodeFile(file));
+
+                //Delete the folder only if all files were removed
+                if (_diskProvider.GetFiles(subfolder, "*.*", SearchOption.AllDirectories).Length == 0)
+                    _diskProvider.DeleteFolder(subfolder, false);
             }
 
             Logger.Debug("New Download Scan Job completed successfully");

NzbDrone.Web/Controllers/AddSeriesController.cs

@@ -54,7 +54,7 @@ namespace NzbDrone.Web.Controllers
                         {
                             Path = r.Path,
                             CleanPath = r.Path.Replace(Path.DirectorySeparatorChar, '|').Replace(Path.VolumeSeparatorChar, '^').Replace('\'', '`')
-                        }).ToList();
+                        });
             ViewData["RootDirs"] = rootDirs;
             ViewData["DirSep"] = Path.DirectorySeparatorChar.ToString().Replace(Path.DirectorySeparatorChar, '|');